<template>
  <div class="carouselBox">
    <el-carousel :loop="false" :autoplay="false" class="carousel">
      <el-carousel-item
        class="el-car-item"
        v-for="(list, index) in dataList"
        :key="index"
      >
        <div v-for="(imgList, index1) in list" :key="index1" class="divSrc">
          <img class="img" :src="imgList.img" />
          <div class="title">{{ imgList.title }}</div>
        </div>
      </el-carousel-item>
    </el-carousel>
  </div>
</template>

<script>
export default {
  data() {
    return {
      dataList: [],
    };
  },
  mounted() {
    this.byEvents();
  },
  methods: {
    byEvents() {
      this.dataList = [
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
        {
          img: "https://picsum.photos/1250/650",
          title: "标题",
        },
      ];

      let newDataList = [];
      let current = 0;
      if (this.dataList && this.dataList.length > 0) {
        for (let i = 0; i <= this.dataList.length - 1; i++) {
          if (i % 3 !== 0 || i === 0) {
            //数据处理成几张展示
            if (!newDataList[current]) {
              newDataList.push([this.dataList[i]]);
            } else {
              newDataList[current].push(this.dataList[i]);
            }
          } else {
            current++;
            newDataList.push([this.dataList[i]]);
          }
        }
      }
      this.dataList = [...newDataList];
    },
  },
};
</script>
<style lang="scss" scoped>
.carouselBox {
  margin: 0 auto;
  width: 1300px;
  height: 420px;
  background-color: #2276f5;
  .carousel {
    width: 100%;
    height: 420px;
    .el-car-item {
      width: 100%;
      height: 420px;
      display: flex;
      .divSrc {
        width: 403px;
        height: 420px;
        background: #fff;
        margin-right: 46px;
        .img {
          width: 403px;
          height: 335px;
        }
        .title {
          width: 90%;
          height: 80px;
          line-height: 80px;
          margin: 0 auto;
          text-align: center;
          font-size: 20px;
          font-weight: bold;
          color: #222222;
          overflow: hidden;
          white-space: nowrap;
          text-overflow: ellipsis;
        }
      }
    }
    /deep/.el-carousel__arrow {
      background: red !important;
      display: block !important;
      margin-top: 65px;
    }
  }
  .el-car-item {
    width: 100%;
    display: flex;

    .img {
      width: 284px;
      height: 184px;
      margin-right: 20px;
      cursor: pointer;
    }
  }
}
</style>
